‘Vancouver, British Columbia: Between multimillion-dollar teardowns, blocks full of backyard cottages and towering condominiums that are sold and resold several times before they are even built, there is no shortage of anecdotes about this city’s housing frenzy. Here is a new one: Vancouver is so expensive that politicians want to tax its real estate market into submission, and many homeowners — who will lose money if home prices fall — think it’s the best idea they’ve heard in years.’